Crushing-mill.



T. J. STURTEVANT.

CBUSHING MILL.

APPLICATIoN FILED JULY 9, 1913.

Patented Dec. 1,1914..

THE MORRIS PETERS C0.. PHOTO-LITHO. WASHINGTON. D. z.

` ments' in Crushing-Mills, of which thefol-` THOMAS JOSEPHSTURTEVANT, ror WELLESLEY, MASSACHUSETTS, ASSIGNOE Tc STURTEVANT MILL COMPANY, A CORPORATION-OF MAINE. l

Specification ci' Letters Patent.

cnUSnInG-MILL.

Patented Dec# 1, 1914.

Application ined :ruiy e, ieia serial No. '278,210.

To all whomct may concern:

at Wellesley, in the county of Norfolkand State of'h/Iassachusetts,` have invented or discovered certain new and useful Improvelowing isa specication, reference being had therein to the accompanying drawings.

This invention relates to that class of crushing mills employing rotary beaters or hammers which cooperate with grates or crushing surfaces in the chambers of the mills. vIn crushing mills of the class referred to `most eiiicient operation is secured by such an adjustment of the beaters or hammers as will enable them to run closely adjacent to the grates or crushing surfaces. Owing, however, to the wear of the crushing parts, and more particularly to the wear on the rotary beaters or hammers, it is very y desirable that a convenient radial adjust-l ment of the working positions of the rotary beaters or hammers should be provided for, to compensate for wear, and the present invention has for sideratum. p

In carrying the present invention into effect the rotary carrier preferably `comprises a plurality of flanged collars spiined to a rotary shaft, and attached to the iianges of these collars are disks having openings cut in such a manner as to provide internal gears. Fitting the said internal gears are toothed bushings or pinions in which are eccentrically mounted pivot-bars connecting the rotary. beaters `or hammers with the rotary carrier. Said toothed bushings or pinions are attached to said "pivot-bars in any suitable manner,`as by being pinned thereto.

` The toothed bushings or pinions at the ends of said pivot-barsmesh with a gear ring mounted on the outer collar on therotary shaft, and Said end bushings or pinions are notched or circumferentially grooved for the reception of a flange on a nut4 having a screw-threaded connection with Said outer collar, so that by turning said nut the toothed bushings or pinions attached to the pivot-bars,- and `serving as eccentric `supports for said bars, may be withdrawn from engagement with the* gearopenings in the disks. When thus disengaged from said its object'to supply this de-l which are cut to form internal gears.

i l i ,disks the connected pivot-bars and toothed Be it known that I, THOMAS .IwSTnRTE-` i vANT, a citizen ofthe United States, residing tated for the purposepof varying the radial positions of the pivot bars and thus adjusting the radialpositions `ot the rotary beaters or hammers pivotedthereon; and when such `adjustment has` been effected the flanged nut may be turned back to return the toothed bushings or pinions'to their first position in 'engagement with the internal gear openings in the disks, and thus again lock saidbushings or-pinions against rotation.`

In the accompanying drawing Figure l is a diametric section showing a rotary carrier and beaters or hammers pivotally mounted thereon in accordance `with the present invention. Fig. 2 is an end view of the same` looking from the left of Figl.` Fig. 3 is a detail view of one of the holding disks and Fig. 4 is a detail view of one of the toothed bushings or pinions to show the eccentric mounting of a pivot-bar.

Referring to the drawing, 12 denotes a rotary crushing mill shaft to which are splined a series of collars 13 and 14 provided with flanges 15. Riveted or otherwise suitably attached to the flanges 15 are disks 16 providedwith openings 17the walls of The parts just described provide av rotary carrier for theV rotary beaters or hammers 18 Vwhich vare connected with said carrier by means of pivot-bars 19, on which are eccentrically mounted toothed bushings or pinions 20 and 21 ttingthe internal gear openings 17 inthe disks 16, and pinned or otherwise suitablyy secured to the said pivot-bars. Thus the said toothedbushings or pinions serve as eccentric supports for Said pivotvbar-s. `The outerbushings or `pinions 20 have, integral therewith but separated therefrom, flanges` 22 between which and the bodies of said bushings or pinions are notches or lcircumferential grooves 23 engaged .by a flange 24: on a nut 25 threaded to the outer collarlf. By screwing the said nut to the left, Fig.` 1, the toothed bushings or pinions 2() and 21 may be Withdrawn Jfrom engagement with the rings 16, and

`when thus withdrawn the connected bushings or pinions and the pivot-bars 19 attached thereto may be partially rotated by applyinga wrench to squared portions 26 at the outerfends of said bushings yor pinions. Preferably the outer' eccentric toothed bushings or pinions 20 allk mesh with a gear ring 29 rotatably mounted on the flange 16 of the outer collar 13, so that ii a wrench be applied to the squared portion 26 of one of the outer bushings or pinions 20, to partially rotate the same, all oi' the other bushings or pinions will be simultaneously rotated.

Owing to the fact that the pivot-bars 19 are eccentric to the bushings or pinions 20 and 2l partial rotation of these parts will eiiect a radial adjustment of the said pivotbars and also of the hammers or beaters 18 lpivoted thereon, and owing to the gear connections of the bushings 20, through the gear ring 29, the partial turning of one set of bushings or pinions 20 and 21 will effect a simultaneous partial rotation of the other sets, to adjust all of the pivot-bars at the same time. When such adjustment vhas been effected the nut 25 maybe screwed back to its first position, thus again bringing the toothed-bushings or pinions 2O and 21 into locking engagement with the disks 16. Accidental displacement of the nut 25, afterit has been properly adjusted, will be prevented by a set-screw 27 provided with a lock-nut 28.

From the foregoing it will be understood that the invention provides a convenient construction whereby the radial working positions of the rotary hammers or beaters x18 may be varied to compensate for wear and to bring them into any desired adjustment relative to the bars or crushing plates in the chamber ofthe mill. l

The invention is not to be understood as being limitedl to' the exact details of construction herein shown and described, as

such details may be varied without departing from the scope of the invention.

Having thus described my invention I claim and desire to secure by Letters Patent: 1. In a crushing mill, the combination with a rotary carrier comprising disks, of rotary beaters or hammers, pivot-bnis connecting said beaters or hammers with said carrier, bushings in said disks in which said pivot-bars are eccentrically mounted,

so that said bushings serveas eccentric supports for said bars, means whereby all oi' said bushings may be partially rotated simultaneously for the purpose of varying the radial working positions of said beaters or hammers, and means for locking said bushings against. rotation after adjustment.

2. In a crushing mill', the combination with a rotary carrier comprising disks 'provided withl internal gear openings, of rotary beaters or hammers, pivot-bars connecting said beaters or hammers with said carrier, toothed eccentric supports for said pivot-bars and to which the latter are .at-

- tat-ed to vary the radial working positions of said beaters or hammers.

3. In a crushing mill, the combination with a rotary carrier comprising disks having internal gear openings, of rotary beaters or hammers, vpivot-bars connecting said beaters or hammers with said carrier, toothed bushings to which-said pivot-bars are attached and in which said pivot-bars are eccentrically mounted, so thatsaid bushingsl serve as eccentric supports for said bars, said bushings fitting said. openings in 'said disks, a gear ring with which the outer set of said toothed bushingsmesh, means for moving said bushingsout of engagement with said disks, when desired, and means permitting partial rotation of said bushings when thus disengaged, for

4. In a crushing mill, the combination w with a rotary carrier comprising disks having internal gear openings, 'of rotary beaters or hammers, pivot-bars connecting said beaters or hammers with said carrier, toothed bushings to which said pivot-bars are attached and in which said pivot-bars vare eccentrically mounted, so that said bushings serve as eccentric supports, for said bars, said bushings fitting said openings in said disks, a gear ring with which the outer set of said toothed bushings mesh, a flanged nut havingA a threaded engagement with a part of said carrier and connected with said bushings so as to be adapted to move them out of engagement withi said disks', when desired, and means permitting artial rotation of said bush-ings when t us disengaged, for the purpose of varying the rradial working'- positions of said beaters or hammers. p

' 5. yIn a crushing mill, the combination with a rotary carrier, of rotary beaters or hal-nmers, pivot-'bars' connecting said beaters orV hammers with said carrier, laterally movable bushings in whichsai'd pivot-bars are eccentrically mounted, so thatsaid bushings serve as eccentric supportsy for said ports for said pivot-bars,. meansV whereby Y all. ofi said eccentric-supports may 'be' 'partially rotated simultaneously for the pur- In testimony whereof I aix my signapose of Varying the radial Workingv posi-y ture, in presence of two Witnesses. tions of said beaters or hammers, means THOMAS JOSEPH STURTEVANT. for moving saidv bushings laterally, when -Wtnesses:

5 desired, andmeans for locking said ecoen- L. K. STURTEVANT,

tric supports in Working positions. W. VELLES.-

Copies of thil patent may be obtained for wre cents each, by addressing` the Commissioner ot Yatents,

Washington, D. C. 

